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999 lines
28 KiB
C
999 lines
28 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
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* Copyright (C) <2016> Matthew Waters <matthew@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-flxdec
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* @title: flxdec
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*
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* This element decodes fli/flc/flx-video into raw video
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*/
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/*
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* http://www.coolutils.com/Formats/FLI
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* http://woodshole.er.usgs.gov/operations/modeling/flc.html
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* http://www.compuphase.com/flic.htm
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "flx_fmt.h"
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#include "gstflxdec.h"
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#include <gst/video/video.h>
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#define JIFFIE (GST_SECOND/70)
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GST_DEBUG_CATEGORY_STATIC (flxdec_debug);
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#define GST_CAT_DEFAULT flxdec_debug
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/* input */
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static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-fli")
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);
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#if G_BYTE_ORDER == G_BIG_ENDIAN
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#define RGB_ORDER "xRGB"
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#else
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#define RGB_ORDER "BGRx"
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#endif
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/* output */
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static GstStaticPadTemplate src_video_factory = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (RGB_ORDER))
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);
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static void gst_flxdec_dispose (GstFlxDec * flxdec);
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static GstFlowReturn gst_flxdec_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buf);
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static gboolean gst_flxdec_sink_event_handler (GstPad * pad,
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GstObject * parent, GstEvent * event);
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static GstStateChangeReturn gst_flxdec_change_state (GstElement * element,
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GstStateChange transition);
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static gboolean gst_flxdec_src_query_handler (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static gboolean flx_decode_color (GstFlxDec * flxdec, GstByteReader * reader,
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GstByteWriter * writer, gint scale);
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static gboolean flx_decode_brun (GstFlxDec * flxdec,
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GstByteReader * reader, GstByteWriter * writer);
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static gboolean flx_decode_delta_fli (GstFlxDec * flxdec,
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GstByteReader * reader, GstByteWriter * writer);
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static gboolean flx_decode_delta_flc (GstFlxDec * flxdec,
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GstByteReader * reader, GstByteWriter * writer);
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#define rndalign(off) ((off) + ((off) & 1))
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#define gst_flxdec_parent_class parent_class
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G_DEFINE_TYPE (GstFlxDec, gst_flxdec, GST_TYPE_ELEMENT);
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static void
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gst_flxdec_class_init (GstFlxDecClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->dispose = (GObjectFinalizeFunc) gst_flxdec_dispose;
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GST_DEBUG_CATEGORY_INIT (flxdec_debug, "flxdec", 0, "FLX video decoder");
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gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_flxdec_change_state);
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gst_element_class_set_static_metadata (gstelement_class, "FLX video decoder",
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"Codec/Decoder/Video",
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"FLC/FLI/FLX video decoder",
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"Sepp Wijnands <mrrazz@garbage-coderz.net>, Zeeshan Ali <zeenix@gmail.com>");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sink_factory));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&src_video_factory));
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}
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static void
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gst_flxdec_init (GstFlxDec * flxdec)
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{
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flxdec->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
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gst_element_add_pad (GST_ELEMENT (flxdec), flxdec->sinkpad);
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gst_pad_set_chain_function (flxdec->sinkpad,
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GST_DEBUG_FUNCPTR (gst_flxdec_chain));
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gst_pad_set_event_function (flxdec->sinkpad,
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GST_DEBUG_FUNCPTR (gst_flxdec_sink_event_handler));
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flxdec->srcpad = gst_pad_new_from_static_template (&src_video_factory, "src");
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gst_element_add_pad (GST_ELEMENT (flxdec), flxdec->srcpad);
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gst_pad_set_query_function (flxdec->srcpad,
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GST_DEBUG_FUNCPTR (gst_flxdec_src_query_handler));
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gst_pad_use_fixed_caps (flxdec->srcpad);
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flxdec->adapter = gst_adapter_new ();
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}
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static void
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gst_flxdec_dispose (GstFlxDec * flxdec)
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{
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if (flxdec->adapter) {
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g_object_unref (flxdec->adapter);
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flxdec->adapter = NULL;
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}
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G_OBJECT_CLASS (parent_class)->dispose ((GObject *) flxdec);
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}
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static gboolean
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gst_flxdec_src_query_handler (GstPad * pad, GstObject * parent,
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GstQuery * query)
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{
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GstFlxDec *flxdec = (GstFlxDec *) parent;
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gboolean ret = FALSE;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_DURATION:
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{
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GstFormat format;
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gst_query_parse_duration (query, &format, NULL);
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if (format != GST_FORMAT_TIME)
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goto done;
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gst_query_set_duration (query, format, flxdec->duration);
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ret = TRUE;
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}
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default:
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break;
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}
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done:
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if (!ret)
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ret = gst_pad_query_default (pad, parent, query);
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return ret;
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}
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static gboolean
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gst_flxdec_sink_event_handler (GstPad * pad, GstObject * parent,
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GstEvent * event)
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{
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GstFlxDec *flxdec;
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gboolean ret;
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flxdec = GST_FLXDEC (parent);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEGMENT:
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{
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gst_event_copy_segment (event, &flxdec->segment);
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if (flxdec->segment.format != GST_FORMAT_TIME) {
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GST_DEBUG_OBJECT (flxdec, "generating TIME segment");
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gst_segment_init (&flxdec->segment, GST_FORMAT_TIME);
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gst_event_unref (event);
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event = gst_event_new_segment (&flxdec->segment);
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}
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if (gst_pad_has_current_caps (flxdec->srcpad)) {
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ret = gst_pad_event_default (pad, parent, event);
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} else {
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flxdec->need_segment = TRUE;
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gst_event_unref (event);
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ret = TRUE;
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}
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break;
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}
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case GST_EVENT_FLUSH_STOP:
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gst_segment_init (&flxdec->segment, GST_FORMAT_UNDEFINED);
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ret = gst_pad_event_default (pad, parent, event);
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break;
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default:
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ret = gst_pad_event_default (pad, parent, event);
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break;
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}
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return ret;
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}
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static gboolean
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flx_decode_chunks (GstFlxDec * flxdec, gulong n_chunks, GstByteReader * reader,
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GstByteWriter * writer)
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{
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gboolean ret = TRUE;
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while (n_chunks--) {
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GstByteReader chunk;
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guint32 size;
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guint16 type;
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if (!gst_byte_reader_get_uint32_le (reader, &size))
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goto parse_error;
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if (!gst_byte_reader_get_uint16_le (reader, &type))
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goto parse_error;
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GST_LOG_OBJECT (flxdec, "chunk has type 0x%02x size %d", type, size);
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if (!gst_byte_reader_get_sub_reader (reader, &chunk,
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size - FlxFrameChunkSize)) {
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GST_ERROR_OBJECT (flxdec, "Incorrect size in the chunk header");
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goto error;
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}
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switch (type) {
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case FLX_COLOR64:
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ret = flx_decode_color (flxdec, &chunk, writer, 2);
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break;
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case FLX_COLOR256:
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ret = flx_decode_color (flxdec, &chunk, writer, 0);
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break;
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case FLX_BRUN:
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ret = flx_decode_brun (flxdec, &chunk, writer);
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break;
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case FLX_LC:
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ret = flx_decode_delta_fli (flxdec, &chunk, writer);
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break;
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case FLX_SS2:
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ret = flx_decode_delta_flc (flxdec, &chunk, writer);
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break;
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case FLX_BLACK:
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ret = gst_byte_writer_fill (writer, 0, flxdec->size);
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break;
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case FLX_MINI:
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break;
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default:
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GST_WARNING ("Unimplemented chunk type: 0x%02x size: %d - skipping",
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type, size);
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break;
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}
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if (!ret)
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break;
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}
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return ret;
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parse_error:
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GST_ERROR_OBJECT (flxdec, "Failed to decode chunk");
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error:
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return FALSE;
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}
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static gboolean
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flx_decode_color (GstFlxDec * flxdec, GstByteReader * reader,
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GstByteWriter * writer, gint scale)
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{
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guint8 count, indx;
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guint16 packs;
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if (!gst_byte_reader_get_uint16_le (reader, &packs))
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goto error;
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indx = 0;
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GST_LOG ("GstFlxDec: cmap packs: %d", (guint) packs);
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while (packs--) {
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const guint8 *data;
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guint16 actual_count;
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/* color map index + skip count */
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if (!gst_byte_reader_get_uint8 (reader, &indx))
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goto error;
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/* number of rgb triplets */
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if (!gst_byte_reader_get_uint8 (reader, &count))
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goto error;
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actual_count = count == 0 ? 256 : count;
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if (!gst_byte_reader_get_data (reader, count * 3, &data))
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goto error;
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GST_LOG_OBJECT (flxdec, "cmap count: %d (indx: %d)", actual_count, indx);
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flx_set_palette_vector (flxdec->converter, indx, actual_count,
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(guchar *) data, scale);
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}
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return TRUE;
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error:
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GST_ERROR_OBJECT (flxdec, "Error decoding color palette");
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return FALSE;
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}
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static gboolean
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flx_decode_brun (GstFlxDec * flxdec, GstByteReader * reader,
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GstByteWriter * writer)
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{
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gulong lines, row;
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g_return_val_if_fail (flxdec != NULL, FALSE);
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lines = flxdec->hdr.height;
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while (lines--) {
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/* packet count.
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* should not be used anymore, since the flc format can
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* contain more then 255 RLE packets. we use the frame
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* width instead.
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*/
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if (!gst_byte_reader_skip (reader, 1))
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goto error;
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row = flxdec->hdr.width;
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while (row) {
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gint8 count;
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if (!gst_byte_reader_get_int8 (reader, &count))
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goto error;
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if (count <= 0) {
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const guint8 *data;
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/* literal run */
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count = ABS (count);
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GST_LOG_OBJECT (flxdec, "have literal run of size %d", count);
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if (count > row) {
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GST_ERROR_OBJECT (flxdec, "Invalid BRUN line detected. "
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"bytes to write exceeds the end of the row");
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return FALSE;
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}
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row -= count;
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if (!gst_byte_reader_get_data (reader, count, &data))
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goto error;
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if (!gst_byte_writer_put_data (writer, data, count))
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goto error;
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} else {
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guint8 x;
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GST_LOG_OBJECT (flxdec, "have replicate run of size %d", count);
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if (count > row) {
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GST_ERROR_OBJECT (flxdec, "Invalid BRUN packet detected."
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"bytes to write exceeds the end of the row");
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return FALSE;
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}
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/* replicate run */
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row -= count;
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if (!gst_byte_reader_get_uint8 (reader, &x))
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goto error;
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if (!gst_byte_writer_fill (writer, x, count))
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goto error;
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}
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}
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}
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return TRUE;
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error:
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GST_ERROR_OBJECT (flxdec, "Failed to decode BRUN packet");
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return FALSE;
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}
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static gboolean
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flx_decode_delta_fli (GstFlxDec * flxdec, GstByteReader * reader,
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GstByteWriter * writer)
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{
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guint16 start_line, lines;
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guint line_start_i;
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g_return_val_if_fail (flxdec != NULL, FALSE);
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g_return_val_if_fail (flxdec->delta_data != NULL, FALSE);
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/* use last frame for delta */
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if (!gst_byte_writer_put_data (writer, flxdec->delta_data, flxdec->size))
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goto error;
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if (!gst_byte_reader_get_uint16_le (reader, &start_line))
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goto error;
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if (!gst_byte_reader_get_uint16_le (reader, &lines))
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goto error;
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GST_LOG_OBJECT (flxdec, "height %d start line %d line count %d",
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flxdec->hdr.height, start_line, lines);
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if (start_line + lines > flxdec->hdr.height) {
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GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. too many lines.");
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return FALSE;
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}
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line_start_i = flxdec->hdr.width * start_line;
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if (!gst_byte_writer_set_pos (writer, line_start_i))
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goto error;
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while (lines--) {
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guint8 packets;
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/* packet count */
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if (!gst_byte_reader_get_uint8 (reader, &packets))
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goto error;
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GST_LOG_OBJECT (flxdec, "have %d packets", packets);
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while (packets--) {
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/* skip count */
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guint8 skip;
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gint8 count;
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if (!gst_byte_reader_get_uint8 (reader, &skip))
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goto error;
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/* skip bytes */
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if (!gst_byte_writer_set_pos (writer,
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gst_byte_writer_get_pos (writer) + skip))
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goto error;
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/* RLE count */
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if (!gst_byte_reader_get_int8 (reader, &count))
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goto error;
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if (count < 0) {
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guint8 x;
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/* literal run */
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count = ABS (count);
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GST_LOG_OBJECT (flxdec, "have literal run of size %d at offset %d",
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count, skip);
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if (skip + count > flxdec->hdr.width) {
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GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. "
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"line too long.");
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return FALSE;
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}
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if (!gst_byte_reader_get_uint8 (reader, &x))
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goto error;
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if (!gst_byte_writer_fill (writer, x, count))
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goto error;
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} else {
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const guint8 *data;
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GST_LOG_OBJECT (flxdec, "have replicate run of size %d at offset %d",
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count, skip);
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if (skip + count > flxdec->hdr.width) {
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GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. "
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"line too long.");
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return FALSE;
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}
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/* replicate run */
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if (!gst_byte_reader_get_data (reader, count, &data))
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goto error;
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if (!gst_byte_writer_put_data (writer, data, count))
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goto error;
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}
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}
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line_start_i += flxdec->hdr.width;
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if (!gst_byte_writer_set_pos (writer, line_start_i))
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goto error;
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}
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return TRUE;
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error:
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GST_ERROR_OBJECT (flxdec, "Failed to decode FLI packet");
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return FALSE;
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}
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static gboolean
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flx_decode_delta_flc (GstFlxDec * flxdec, GstByteReader * reader,
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GstByteWriter * writer)
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{
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guint16 lines, start_l;
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|
|
g_return_val_if_fail (flxdec != NULL, FALSE);
|
|
g_return_val_if_fail (flxdec->delta_data != NULL, FALSE);
|
|
|
|
/* use last frame for delta */
|
|
if (!gst_byte_writer_put_data (writer, flxdec->delta_data, flxdec->size))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &lines))
|
|
goto error;
|
|
|
|
if (lines > flxdec->hdr.height) {
|
|
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. too many lines.");
|
|
return FALSE;
|
|
}
|
|
|
|
start_l = lines;
|
|
|
|
while (lines) {
|
|
guint16 opcode;
|
|
|
|
if (!gst_byte_writer_set_pos (writer,
|
|
flxdec->hdr.width * (start_l - lines)))
|
|
goto error;
|
|
|
|
/* process opcode(s) */
|
|
while (TRUE) {
|
|
if (!gst_byte_reader_get_uint16_le (reader, &opcode))
|
|
goto error;
|
|
if ((opcode & 0xc000) == 0)
|
|
break;
|
|
|
|
if ((opcode & 0xc000) == 0xc000) {
|
|
/* line skip count */
|
|
gulong skip = (0x10000 - opcode);
|
|
if (skip > flxdec->hdr.height) {
|
|
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
|
|
"skip line count too big.");
|
|
return FALSE;
|
|
}
|
|
start_l += skip;
|
|
if (!gst_byte_writer_set_pos (writer,
|
|
gst_byte_writer_get_pos (writer) + flxdec->hdr.width * skip))
|
|
goto error;
|
|
} else {
|
|
/* last pixel */
|
|
if (!gst_byte_writer_set_pos (writer,
|
|
gst_byte_writer_get_pos (writer) + flxdec->hdr.width))
|
|
goto error;
|
|
if (!gst_byte_writer_put_uint8 (writer, opcode & 0xff))
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
/* last opcode is the packet count */
|
|
GST_LOG_OBJECT (flxdec, "have %d packets", opcode);
|
|
while (opcode--) {
|
|
/* skip count */
|
|
guint8 skip;
|
|
gint8 count;
|
|
|
|
if (!gst_byte_reader_get_uint8 (reader, &skip))
|
|
goto error;
|
|
if (!gst_byte_writer_set_pos (writer,
|
|
gst_byte_writer_get_pos (writer) + skip))
|
|
goto error;
|
|
|
|
/* RLE count */
|
|
if (!gst_byte_reader_get_int8 (reader, &count))
|
|
goto error;
|
|
|
|
if (count < 0) {
|
|
guint16 x;
|
|
|
|
/* replicate word run */
|
|
count = ABS (count);
|
|
|
|
GST_LOG_OBJECT (flxdec, "have replicate run of size %d at offset %d",
|
|
count, skip);
|
|
|
|
if (skip + count > flxdec->hdr.width) {
|
|
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
|
|
"line too long.");
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_byte_reader_get_uint16_le (reader, &x))
|
|
goto error;
|
|
|
|
while (count--) {
|
|
if (!gst_byte_writer_put_uint16_le (writer, x)) {
|
|
goto error;
|
|
}
|
|
}
|
|
} else {
|
|
GST_LOG_OBJECT (flxdec, "have literal run of size %d at offset %d",
|
|
count, skip);
|
|
|
|
if (skip + count > flxdec->hdr.width) {
|
|
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
|
|
"line too long.");
|
|
return FALSE;
|
|
}
|
|
|
|
while (count--) {
|
|
guint16 x;
|
|
|
|
if (!gst_byte_reader_get_uint16_le (reader, &x))
|
|
goto error;
|
|
if (!gst_byte_writer_put_uint16_le (writer, x))
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
lines--;
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
error:
|
|
GST_ERROR_OBJECT (flxdec, "Failed to decode FLI packet");
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
_read_flx_header (GstFlxDec * flxdec, GstByteReader * reader, FlxHeader * flxh)
|
|
{
|
|
memset (flxh, 0, sizeof (*flxh));
|
|
|
|
if (!gst_byte_reader_get_uint32_le (reader, &flxh->size))
|
|
goto error;
|
|
if (flxh->size < FlxHeaderSize) {
|
|
GST_ERROR_OBJECT (flxdec, "Invalid file size in the header");
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->type))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->frames))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->width))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->height))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->depth))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->flags))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint32_le (reader, &flxh->speed))
|
|
goto error;
|
|
if (!gst_byte_reader_skip (reader, 2)) /* reserved */
|
|
goto error;
|
|
/* FLC */
|
|
if (!gst_byte_reader_get_uint32_le (reader, &flxh->created))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint32_le (reader, &flxh->creator))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint32_le (reader, &flxh->updated))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint32_le (reader, &flxh->updater))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->aspect_dx))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->aspect_dy))
|
|
goto error;
|
|
/* EGI */
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->ext_flags))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->keyframes))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->totalframes))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint32_le (reader, &flxh->req_memory))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->max_regions))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint16_le (reader, &flxh->transp_num))
|
|
goto error;
|
|
if (!gst_byte_reader_skip (reader, 24)) /* reserved */
|
|
goto error;
|
|
/* FLC */
|
|
if (!gst_byte_reader_get_uint32_le (reader, &flxh->oframe1))
|
|
goto error;
|
|
if (!gst_byte_reader_get_uint32_le (reader, &flxh->oframe2))
|
|
goto error;
|
|
if (!gst_byte_reader_skip (reader, 40)) /* reserved */
|
|
goto error;
|
|
|
|
return TRUE;
|
|
|
|
error:
|
|
GST_ERROR_OBJECT (flxdec, "Error reading file header");
|
|
return FALSE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flxdec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
|
|
{
|
|
GstByteReader reader;
|
|
GstBuffer *input;
|
|
GstMapInfo map_info;
|
|
GstCaps *caps;
|
|
guint available;
|
|
GstFlowReturn res = GST_FLOW_OK;
|
|
|
|
GstFlxDec *flxdec;
|
|
FlxHeader *flxh;
|
|
|
|
g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);
|
|
flxdec = (GstFlxDec *) parent;
|
|
g_return_val_if_fail (flxdec != NULL, GST_FLOW_ERROR);
|
|
|
|
gst_adapter_push (flxdec->adapter, buf);
|
|
available = gst_adapter_available (flxdec->adapter);
|
|
input = gst_adapter_get_buffer (flxdec->adapter, available);
|
|
if (!gst_buffer_map (input, &map_info, GST_MAP_READ)) {
|
|
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
|
|
("%s", "Failed to map buffer"), (NULL));
|
|
goto error;
|
|
}
|
|
gst_byte_reader_init (&reader, map_info.data, map_info.size);
|
|
|
|
if (flxdec->state == GST_FLXDEC_READ_HEADER) {
|
|
if (available >= FlxHeaderSize) {
|
|
GstByteReader header;
|
|
GstCaps *templ;
|
|
|
|
if (!gst_byte_reader_get_sub_reader (&reader, &header, FlxHeaderSize)) {
|
|
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
|
|
("%s", "Could not read header"), (NULL));
|
|
goto unmap_input_error;
|
|
}
|
|
gst_adapter_flush (flxdec->adapter, FlxHeaderSize);
|
|
available -= FlxHeaderSize;
|
|
|
|
if (!_read_flx_header (flxdec, &header, &flxdec->hdr)) {
|
|
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
|
|
("%s", "Failed to parse header"), (NULL));
|
|
goto unmap_input_error;
|
|
}
|
|
|
|
flxh = &flxdec->hdr;
|
|
|
|
/* check header */
|
|
if (flxh->type != FLX_MAGICHDR_FLI &&
|
|
flxh->type != FLX_MAGICHDR_FLC && flxh->type != FLX_MAGICHDR_FLX) {
|
|
GST_ELEMENT_ERROR (flxdec, STREAM, WRONG_TYPE, (NULL),
|
|
("not a flx file (type %x)", flxh->type));
|
|
goto unmap_input_error;
|
|
}
|
|
|
|
GST_INFO_OBJECT (flxdec, "size : %d", flxh->size);
|
|
GST_INFO_OBJECT (flxdec, "frames : %d", flxh->frames);
|
|
GST_INFO_OBJECT (flxdec, "width : %d", flxh->width);
|
|
GST_INFO_OBJECT (flxdec, "height : %d", flxh->height);
|
|
GST_INFO_OBJECT (flxdec, "depth : %d", flxh->depth);
|
|
GST_INFO_OBJECT (flxdec, "speed : %d", flxh->speed);
|
|
|
|
flxdec->next_time = 0;
|
|
|
|
if (flxh->type == FLX_MAGICHDR_FLI) {
|
|
flxdec->frame_time = JIFFIE * flxh->speed;
|
|
} else if (flxh->speed == 0) {
|
|
flxdec->frame_time = GST_SECOND / 70;
|
|
} else {
|
|
flxdec->frame_time = flxh->speed * GST_MSECOND;
|
|
}
|
|
|
|
flxdec->duration = flxh->frames * flxdec->frame_time;
|
|
GST_LOG ("duration : %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (flxdec->duration));
|
|
|
|
templ = gst_pad_get_pad_template_caps (flxdec->srcpad);
|
|
caps = gst_caps_copy (templ);
|
|
gst_caps_unref (templ);
|
|
gst_caps_set_simple (caps,
|
|
"width", G_TYPE_INT, flxh->width,
|
|
"height", G_TYPE_INT, flxh->height,
|
|
"framerate", GST_TYPE_FRACTION, (gint) GST_MSECOND,
|
|
(gint) flxdec->frame_time / 1000, NULL);
|
|
|
|
gst_pad_set_caps (flxdec->srcpad, caps);
|
|
gst_caps_unref (caps);
|
|
|
|
if (flxdec->need_segment) {
|
|
gst_pad_push_event (flxdec->srcpad,
|
|
gst_event_new_segment (&flxdec->segment));
|
|
flxdec->need_segment = FALSE;
|
|
}
|
|
|
|
/* zero means 8 */
|
|
if (flxh->depth == 0)
|
|
flxh->depth = 8;
|
|
|
|
if (flxh->depth != 8) {
|
|
GST_ELEMENT_ERROR (flxdec, STREAM, WRONG_TYPE,
|
|
("%s", "Don't know how to decode non 8 bit depth streams"), (NULL));
|
|
goto unmap_input_error;
|
|
}
|
|
|
|
flxdec->converter =
|
|
flx_colorspace_converter_new (flxh->width, flxh->height);
|
|
|
|
if (flxh->type == FLX_MAGICHDR_FLC || flxh->type == FLX_MAGICHDR_FLX) {
|
|
GST_INFO_OBJECT (flxdec, "(FLC) aspect_dx : %d", flxh->aspect_dx);
|
|
GST_INFO_OBJECT (flxdec, "(FLC) aspect_dy : %d", flxh->aspect_dy);
|
|
GST_INFO_OBJECT (flxdec, "(FLC) oframe1 : 0x%08x", flxh->oframe1);
|
|
GST_INFO_OBJECT (flxdec, "(FLC) oframe2 : 0x%08x", flxh->oframe2);
|
|
}
|
|
|
|
flxdec->size = ((guint) flxh->width * (guint) flxh->height);
|
|
if (flxdec->size >= G_MAXSIZE / 4) {
|
|
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
|
|
("%s", "Cannot allocate required memory"), (NULL));
|
|
goto unmap_input_error;
|
|
}
|
|
|
|
/* create delta and output frame */
|
|
flxdec->frame_data = g_malloc0 (flxdec->size);
|
|
flxdec->delta_data = g_malloc0 (flxdec->size);
|
|
|
|
flxdec->state = GST_FLXDEC_PLAYING;
|
|
}
|
|
} else if (flxdec->state == GST_FLXDEC_PLAYING) {
|
|
GstBuffer *out;
|
|
|
|
/* while we have enough data in the adapter */
|
|
while (available >= FlxFrameChunkSize && res == GST_FLOW_OK) {
|
|
guint32 size;
|
|
guint16 type;
|
|
|
|
if (!gst_byte_reader_get_uint32_le (&reader, &size))
|
|
goto parse_error;
|
|
if (available < size)
|
|
goto need_more_data;
|
|
|
|
available -= size;
|
|
gst_adapter_flush (flxdec->adapter, size);
|
|
|
|
if (!gst_byte_reader_get_uint16_le (&reader, &type))
|
|
goto parse_error;
|
|
|
|
switch (type) {
|
|
case FLX_FRAME_TYPE:{
|
|
GstByteReader chunks;
|
|
GstByteWriter writer;
|
|
guint16 n_chunks;
|
|
GstMapInfo map;
|
|
|
|
GST_LOG_OBJECT (flxdec, "Have frame type 0x%02x of size %d", type,
|
|
size);
|
|
|
|
if (!gst_byte_reader_get_sub_reader (&reader, &chunks,
|
|
size - FlxFrameChunkSize))
|
|
goto parse_error;
|
|
|
|
if (!gst_byte_reader_get_uint16_le (&chunks, &n_chunks))
|
|
goto parse_error;
|
|
GST_LOG_OBJECT (flxdec, "Have %d chunks", n_chunks);
|
|
|
|
if (n_chunks == 0)
|
|
break;
|
|
if (!gst_byte_reader_skip (&chunks, 8)) /* reserved */
|
|
goto parse_error;
|
|
|
|
gst_byte_writer_init_with_data (&writer, flxdec->frame_data,
|
|
flxdec->size, TRUE);
|
|
|
|
/* decode chunks */
|
|
if (!flx_decode_chunks (flxdec, n_chunks, &chunks, &writer)) {
|
|
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
|
|
("%s", "Could not decode chunk"), NULL);
|
|
goto unmap_input_error;
|
|
}
|
|
gst_byte_writer_reset (&writer);
|
|
|
|
/* save copy of the current frame for possible delta. */
|
|
memcpy (flxdec->delta_data, flxdec->frame_data, flxdec->size);
|
|
|
|
out = gst_buffer_new_and_alloc (flxdec->size * 4);
|
|
if (!gst_buffer_map (out, &map, GST_MAP_WRITE)) {
|
|
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
|
|
("%s", "Could not map output buffer"), NULL);
|
|
gst_buffer_unref (out);
|
|
goto unmap_input_error;
|
|
}
|
|
|
|
/* convert current frame. */
|
|
flx_colorspace_convert (flxdec->converter, flxdec->frame_data,
|
|
map.data);
|
|
gst_buffer_unmap (out, &map);
|
|
|
|
GST_BUFFER_TIMESTAMP (out) = flxdec->next_time;
|
|
flxdec->next_time += flxdec->frame_time;
|
|
|
|
res = gst_pad_push (flxdec->srcpad, out);
|
|
break;
|
|
}
|
|
default:
|
|
GST_DEBUG_OBJECT (flxdec, "Unknown frame type 0x%02x, skipping %d",
|
|
type, size);
|
|
if (!gst_byte_reader_skip (&reader, size - FlxFrameChunkSize))
|
|
goto parse_error;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
need_more_data:
|
|
gst_buffer_unmap (input, &map_info);
|
|
gst_buffer_unref (input);
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
parse_error:
|
|
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
|
|
("%s", "Failed to parse stream"), (NULL));
|
|
unmap_input_error:
|
|
gst_buffer_unmap (input, &map_info);
|
|
error:
|
|
gst_buffer_unref (input);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_flxdec_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstFlxDec *flxdec;
|
|
GstStateChangeReturn ret;
|
|
|
|
flxdec = GST_FLXDEC (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
gst_adapter_clear (flxdec->adapter);
|
|
flxdec->state = GST_FLXDEC_READ_HEADER;
|
|
gst_segment_init (&flxdec->segment, GST_FORMAT_UNDEFINED);
|
|
flxdec->need_segment = TRUE;
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
if (flxdec->frame_data) {
|
|
g_free (flxdec->frame_data);
|
|
flxdec->frame_data = NULL;
|
|
}
|
|
if (flxdec->delta_data) {
|
|
g_free (flxdec->delta_data);
|
|
flxdec->delta_data = NULL;
|
|
}
|
|
if (flxdec->converter) {
|
|
flx_colorspace_converter_destroy (flxdec->converter);
|
|
flxdec->converter = NULL;
|
|
}
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "flxdec",
|
|
GST_RANK_PRIMARY, GST_TYPE_FLXDEC);
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
flxdec,
|
|
"FLC/FLI/FLX video decoder",
|
|
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
|